EN 492:2012

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Faserzement-Dachplatten und dazugehörige Formteile - Produktspezifikation und PrüfverfahrenArdoises en fibres-ciment et leurs accessoires en fibres-ciment - Spécification du produit et méthodes d'essaiFibre-cement slates and fittings - Product specification and test methods91.100.40YODNQLProducts in fibre-reinforced cement91.060.20StreheRoofsICS:Ta slovenski standard je istoveten z:EN 492:2012SIST EN 492:2013en,fr,de01-april-2013SIST EN 492:2013SLOVENSKI
STANDARDSIST EN 492:2005/A2:2006SIST EN 492:2005/A1:2006SIST EN 492:20051DGRPHãþD

EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 492
October 2012 ICS 91.100.40 Supersedes EN 492:2004English Version
Fibre-cement slates and fittings - Product specification and test methods
Ardoises en fibres-ciment et leurs accessoires en fibres-ciment - Spécification du produit et méthodes d'essai
Faserzement-Dachplatten und dazugehörige Formteile - Produktspezifikation und Prüfverfahren This European Standard was approved by CEN on 4 August 2012.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.
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Consignment inspection sampling . 32Annex B (normative)
Statistical method for determining the corresponding wet values or revised dry specifications for the bending moment when carrying out the dry method of test for quality control purposes . 33B.1Procedure . 33B.2Determination of the correlation between the results of testing wet and dry specimens . 33B.3Determination of the regression line . 34B.4Determination of a value for wet testing from an obtained value for dry testing . 34B.5Determination of the minimum value specified for dry testing xstd corresponding to the minimum value specified for wet testing in this standard ystd . 35Annex C (informative)
Examples . 37C.1Examples of dimension h . 37C.2Examples of fibre-cement slates installed showing lines of fixing . 39Annex D (normative)
Requirements of Decision 2001/671/EC regarding the external fire performance of roof coverings expressed following the classes defined in EN 13501-5 . 40Annex ZA (informative)
Clauses of this European Standard addressing the provisions of the EU Construction Products Directive . 41ZA.1Scope and relevant characteristics . 41ZA.2Procedure for the attestation of conformity of fibre cement slates and fittings . 43ZA.2.1Systems of attestation of conformity . 43ZA.2.2EC Declaration of conformity . 45ZA.3CE marking . 47Bibliography . 49 SIST EN 492:2013

one of the coefficients of the regression line (Annex B) SIST EN 492:2013

ls span between the centres of the test machine supports in the bending moment test in millimetres
m mass of the specimen after drying in grams M bending moment at rupture in newton metres per metre Mfi bending moment (average of both directions) at rupture of the specimen from the ith pair tested after the type test (second lot) in newton metres per metre Mfci
bending moment (average of both directions) at rupture of the specimen from the ith pair tested for reference in the type test (first lot) in newton metres per metre
R average ratio of the bending moments at rupture before and after the type test Ri individual ratio of the bending moments at rupture of the ith pair of specimens before and after a type test RL lower estimate of the mean of the ratios at 95 % confidence level of the bending moments at rupture before and after the type test s standard deviation of the values in the appropriate calculation V volume of the specimen in cubic centimetres xo actual result obtained when dry testing
xstd minimum value to be used as the specification for the dry method of test. This value is calculated at the 97,5 % lower confidence level from the value ystd specified for the wet method of test in this document yo value calculated from the value obtained from a specimen tested dry, which is the estimate at the 97,5 % lower confidence level of the value expected from a specimen tested wet ystd minimum value specified in the standard for wet testing. 5 Product requirements 5.1 General 5.1.1 Composition Fibre-cement slates and fittings shall consist essentially of cement or a calcium silicate formed by chemical reaction of a siliceous and a calcareous material, reinforced by fibres. The cement shall comply with EN 197-1 or with technical specifications relevant in the country of use. SIST EN 492:2013

The reinforcing fibres shall take one or more of the following forms:  discrete elements randomly dispersed,  continuous strands or tapes,  nets or webs. Process aids, fillers and pigments which are compatible with the composite may be added. 5.1.2 Appearance and finish The exposed face of the fibre-cement slates may be with or without texture. The fibre-cement slates may be coloured or left in their natural colour. The fibre-cement slates may also receive adherent coloured or uncoloured coatings on their surface. The fibre-cement slates may be supplied with holes for fixing. On exposure, the surface and/or its coating will be affected by weathering which may vary with site location, aspect, pitch of roof and duration of exposure. Any deterioration in this respect shall not detract from the minimum mechanical and physical characteristics as specified in this document or from the function of the fibre-cement slate as a durable element. The fittings shall have a general appearance and finish compatible with the fibre-cement slates with which they are to be used. They may be supplied with holes for fixing. 5.2 Dimensions and tolerance 5.2.1 General The manufacturer shall specify the shapes, sizes and configuration of edges. NOTE See 5.6 for designation and information. Fittings shall have nominal dimensions and shapes determined by the manufacturer and appropriate to the corresponding fibre-cement slates. 5.2.2 Thicknesses The actual fibre-cement slate thickness determined in accordance with 7.2 shall be not less than that shown in Table 1. The nominal thickness shall be specified by the manufacturer. The nominal thickness of the fittings shall be not less than the corresponding nominal thickness of the fibre-cement slates with which the fittings are to be used. 5.2.3 Tolerances on nominal dimensions The maximum dimensional variation when measured as specified in 7.2 shall be as follows:  Length and width:
± 3 mm;  Thickness:
2510+− % of the nominal value. SIST EN 492:2013

thickness ea (mm) Minimum bending moment, average of the two directions (Nm/m) h ≤ 350 2,8 30 350 < h ≤ 450 3,0 40 450 < h ≤ 600 3,5 45 600 < h ≤ 850 4,0 55 a e is the arithmetic mean of four measurements (according to 7.2.4).
5.3.4 Water impermeability When tested in accordance with 7.3.3, traces of moisture may appear on the under face of the fibre-cement slate, but in no instance shall there be any formation of drops of water. SIST EN 492:2013

 height (h), size and shape. The manufacturer shall include the following in his literature: a) designation of the fibre-cement slate as above; b) nominal values for: 1) thickness;
2) length and width. c) minimum apparent density; d) information relevant to the handling and installation. 6 Evaluation of conformity 6.1 General The conformity of products with the requirements of this standard shall be demonstrated by:  initial type testing; and  factory production control by the manufacturer. 6.2 Initial type testing Type tests shall be carried out on products as delivered. If several formats or sizes of the same nominal thickness are being produced from the same composition and by the same production method, type tests only need to be carried out on one size of each nominal thickness. All characteristics listed in Table 2 shall be subject to initial type testing, except reaction to fire Class A1 without testing and external fire performance "deemed to satisfy" products. Initial type testing shall be performed to demonstrate conformity to this standard. Tests previously performed in accordance with the provisions of this standard (same product, same characteristic(s), test method, sampling procedure, same attestation of conformity, etc.) may be taken into account. In addition, initial type testing shall be performed for the approval of a new product, or a fundamental change in formulation or method of manufacture, the effects of which cannot be predicted on the basis of previous experience. The results of all type tests shall be recorded and held by the manufacturer for at least five years after production of products covered by the type test have ceased production. Whenever a change occurs in the fibre-cement slate design, the raw material or supplier of components or the production process, which would change significantly one or more of the characteristics, the type test shall be performed for the appropriate characteristic(s). SIST EN 492:2013

Requirement Assessment method Number of samples Compliance criteria Mechanical resistance (slates) 5.3.3 7.3.2 Inspection S3 as per ISO 2859-1 5.3.3 Table 1 apply 4 % AQL Density (slates) 5.3.2 7.3.1 7.3.1 5.3.2 and 7.3.1 External fire performance (slates) 5.5.1 7.5.1 7.5.1 7.5.1 Reaction to fire (slates and fittings) 5.5.2 7.5.2 7.5.2 7.5.2 Water impermeability (slates) 5.3.4 7.3.3 3 test slates 5.3.4 Dimensional variations (slates and fittings) 5.2 7.2 Inspection S3 as per ISO 2859-1 5.2.2 and 5.2.3 Release of dangerous substances (slates and fittings) 5.5.3 5.5.3 - 5.5.3 Warm water (slates) 5.4.4 7.3.4 10 samples 5.4.4 and 7.3.4.4 Soak/Dry (slates) 5.4.5 7.3.5 10 samples 5.4.5 and 7.3.5.4 Freeze-Thaw (slates) 5.4.2 7.4.1 10 samples 5.4.2 and 7.4.1.4 Heat-Rain (slates) 5.4.3 7.4.2 11 samples 5.4.3 and 7.4.2.4 6.3 Factory Production Control (FPC) 6.3.1 General The manufacturer shall establish, document and maintain a FPC system to ensure that the products placed on the market conform with the stated performance characteristics. The FPC system shall consist of procedures, regular inspections and tests and/or assessments and the use of the results to control raw and other incoming materials or components, equipment, the production process and the product. A manufacturer who has established a Quality Management System according to EN ISO 9001 and made specific to the requirements of this standard is considered to satisfy the above requirements. The results of inspections, tests or assessments requiring action shall be recorded, as shall the action(s) taken. 6.3.2 Acceptance tests The specifications of acceptance tests apply to the product as delivered, but may be carried out at an earlier stage of maturity. Sampling from continuous production testing  on the base sheet prior to coating,  in conditions other than in Table 4, SIST EN 492:2013

Length Width Thickness ISO 2859-1 Inspection by attribute Double sampling AQL 4 % Level S1 Apparent density Bending moment ISO 3951-1 Inspection by variable; method s or σ AQL 4 % Level S3 Fittings
Length Width Thickness The same as for the dimensional characteristics of fibre-cement slates 6.3.3 Equipment All weighing, measuring and testing equipment shall be calibrated and regularly inspected according to documented procedures, frequencies and criteria. 6.3.4 Raw materials and components The specification of all incoming raw materials and components shall be documented, as shall the inspection scheme for ensuring conformity.
6.3.5 Product testing and evaluation The manufacturer shall establish procedures to ensure that the declared values of all of the characteristics are maintained. 6.3.6 Non-conforming products Non-conforming products shall be separated and handled according to documented procedures. SIST EN 492:2013

7.2.4 Expression and interpretation of results 7.2.4.1 Length and width Each value shall comply with the tolerance specified in 5.2.3. 7.2.4.2 Thickness The average of the four measurements shall be not less than the minimum given in Table 1 and shall comply with the tolerances specified in 5.2.3. 7.3 Tests for physical performance and characteristics 7.3.1 Apparent density 7.3.1.1 Preparation of specimen The test specimen shall be a piece of the fibre-cement slate used for the bending test. SIST EN 492:2013

The apparent density is given by the formula: Vmd= where d is the apparent density in grams per cubic centimetres;
m
is the mass of the test specimen after drying in grams; V is the volume of the test specimen in cubic centimetres.
The result shall conform to the specification of 5.3.2. 7.3.2 Mechanical characteristics: Breaking load test 7.3.2.1 Preparation of specimens The dimensions of the test specimen shall be large enough to ensure that it overlaps each test support by at least 10 % of the span when tested in each direction. The specimen can be square or rectangular. Testing shall be carried out after wet conditioning except that for quality control purposes dry testing can be carried out providing it has been statistically established (see Annex B) that compliance with the requirements for wet testing given in Table 1 is ensured. Specimens shall be conditioned in accordance with Table 4. SIST EN 492:2013

The upper face of each support shall be rounded with a radius between 3 mm and 25 mm. The distance ls between the supports (span) shall be 200 mm except where the specimen dimension is too small to allow an overlap of each test support by at least 10 %, in which case the distance between the supports can be reduced to meet this overlap criteria. 7.3.2.2.1.2 A loading bar, having the same radius as the supports and located parallel and equidistant from them.
The loading bar shall be attached to the loading mechanism by means of a flexible joint. Dimensions in millimetres
Figure 1 — Bending test machine SIST EN 492:2013

Figure 2 — Sample after first bending
Figure 3 — Sample after second bending 7.3.2.4 Expression and interpretation of results The bending moment at rupture for each direction is given by the following formula: blFMS××=4 where
M is the bending moment at rupture, in newton metres per metre; F is the load at rupture, in newtons; ls is the span between the centres of the supports, in millimetres; b is the dimension of the specimen (length or width) measured parallel to the supports, in millimetres. Calculate the bending moment for both the average of the two directions and for the weaker direction. For specimens tested wet, the results of the test shall conform to the specification of 5.3.3. SIST EN 492:2013

Vertical transparent tube, 300 mm long with a minimum bore of 35 mm. 7.3.3.3 Procedure Seal the vertical transparent tube to the middle of the upper face of the test specimen supported horizontally for inspection.
Fill the tube with water to a height of approximately 250 mm, measured from the upper surface of the test specimen. Leave for 24 h in ambient laboratory conditions. Examine the under face of the test piece after 24 h. 7.3.3.4 Expression and interpretation of results After visual assessment, the result shall conform to the specification of 5.3.4. 7.3.4 Warm water 7.3.4.1 Preparation of specimens Sample ten fibre-cement slates as delivered. Cut ten pairs of specimens to suit the bending test in 7.3.2. Both specimens of a pair shall be cut from the same fibre-cement slate and each given the same number for later comparison of results. 7.3.4.2 Apparatus 7.3.4.2.1 Water bath, with a temperature control at (60 ± 2) °C; 7.3.4.2.2 Bending test machine, as described in 7.3.2.2. 7.3.4.3 Procedure Divide the paired specimens to form two lots of ten specimens each. Submit the first lot of ten specimens to the bending test in accordance with 7.3.2 including the conditioning procedure (see Table 4). SIST EN 492:2013

is the bending moment at rupture of the specimen from the ith pair tested after warm water immersion (the second lot); Mfc i is the bending moment at rupture of the specimen from the ith pair tested for reference (the first lot). Calculate the average, R, and standard deviation, s, of the individual ratios, Ri. Calculate the lower estimation, RL, of the mean of the ratios at 95 % confidence level as follows (ISO 2602): sRR58,0L−= The result shall conform to the specification of 5.4.4. 7.3.5 Soak-dry 7.3.5.1 Preparation of specimens Sample ten fibre-cement slates as delivered. Cut ten sets of paired specimens to suit the bending test in 7.3.2. Both specimens of a pair shall be cut from the same fibre-cement slate and given the same number for later comparison of results. 7.3.5.2 Apparatus 7.3.5.2.1 Ventilated oven, with temperature control to (60 ± 5) °C and a relative humidity of < 20 % with full load of specimens.
The 20 % humidity shall be achieved for at least 3 h prior to the conclusion of the 6 h drying. 7.3.5.2.2 Bath, filled with water at ambient temperature (> 5 °C). 7.3.5.2.3 Bending test machine, as described in 7.3.2.2. 7.3.5.3 Procedure Divide the paired specimens to form two lots of ten specimens each. SIST EN 492:2013
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